Add Kubernetes configuration

[waldher]

For larger deployments, or deployments to clusters, it makes sense that a Kubernetes configuration gets maintained. I added all of the manifests needed to do so in the kubernetes/ directory, and included a Kustomization, which should make it easy to tweak configuration, such as version or database credentials.

[eikek]

Hi @waldher - thank you a lot for your work! I have to admit, I'm a bit hesitant to add this. The main concern is that I won't be able to support this. If there arises any issue, I won't be able to help and I won't be able to maintain it further. So … if you like to do that, then it is fine for me 😄 For issues regarding the k8s setup, I would ping you.

Another option is to create a separate repository that can maintain a kubernetes configuration. I know that these configs can grow quite complex. Of course, we can add links into the documentation to these places. wdyt?

[waldher]

I'm more than happy to maintain this, as I use it actively.

I don't anticipate a large amount of maintenance, as it's about as much work to maintain as the docker-compose.yaml, and the changes are even the same. Generally, updates to environment variables or changes to the startup commands for restserver or joex necessitate updating here, but not much else is necessary to maintain.

I do think it makes sense to have it in the repository, as it's tightly coupled to the application, and I'd be worried that a separate repository would be neglected.

[eikek]

Sorry for the delay! Ok, so we go that way :)